TY - JOUR
T1 - Bimetal based inorganic-carbonic anhydrase hybrid hydrogel membrane for CO2 capture
AU - Wen, Huan
AU - Zhang, Lei
AU - Du, Yingjie
AU - Wang, Ziyuan
AU - Jiang, Yunhong
AU - Bian, Hongjie
AU - Cui, Jiandong
AU - Jia, Shiru
PY - 2020/7/1
Y1 - 2020/7/1
N2 - In this study, we synthesized for the first time a bimetal-based inorganic-carbonic anhydrase (CA) hybrid nanoflower to immobilize CA using Cu2+ and Zn2+ instead of single metal ion. Subsequently, the synthesized bimetallic hybrid nanoflowers (CANF) were embedded into the poly(vinyl alcohol) (PVA)-chitosan (CS) hydrogel networks to obtain PVA/CS@CANF hydrogel membrane. The CANF exhibited a significantly higher activity recovery of 70 % compared with 35 % with CA/Zn3(PO4)2 hybrid nanoflowers and 10 % with CA/Cu3(PO4)2 hybrid nanoflowers. The PVA/CS@CANF hydrogel membrane possessed excellent mechanical strength, high catalytic activity, and were easy to flow out without centrifugation or filtration. At the same time, the PVA/CS@CANF displayed higher thermostability, storage stability, and pH stability than free CA and CANF, and superior reusability and CO2 capture capacity. The hydrogel membrane maintained more than 75 % of its original activity after 8 cycles. However, CANF only maintained 12 % of its original activity. Furthermore, the amount of CaCO3 produced by PVA/CS@CANF membrane was 9.0-fold and 2.0-fold compared with free CA and CANF, respectively. Therefore, This approach to synthesizing bimetallic-based protein hybrid hydrogel membrane could have a bright future in CO2 capture.
AB - In this study, we synthesized for the first time a bimetal-based inorganic-carbonic anhydrase (CA) hybrid nanoflower to immobilize CA using Cu2+ and Zn2+ instead of single metal ion. Subsequently, the synthesized bimetallic hybrid nanoflowers (CANF) were embedded into the poly(vinyl alcohol) (PVA)-chitosan (CS) hydrogel networks to obtain PVA/CS@CANF hydrogel membrane. The CANF exhibited a significantly higher activity recovery of 70 % compared with 35 % with CA/Zn3(PO4)2 hybrid nanoflowers and 10 % with CA/Cu3(PO4)2 hybrid nanoflowers. The PVA/CS@CANF hydrogel membrane possessed excellent mechanical strength, high catalytic activity, and were easy to flow out without centrifugation or filtration. At the same time, the PVA/CS@CANF displayed higher thermostability, storage stability, and pH stability than free CA and CANF, and superior reusability and CO2 capture capacity. The hydrogel membrane maintained more than 75 % of its original activity after 8 cycles. However, CANF only maintained 12 % of its original activity. Furthermore, the amount of CaCO3 produced by PVA/CS@CANF membrane was 9.0-fold and 2.0-fold compared with free CA and CANF, respectively. Therefore, This approach to synthesizing bimetallic-based protein hybrid hydrogel membrane could have a bright future in CO2 capture.
U2 - 10.1016/j.jcou.2020.101171
DO - 10.1016/j.jcou.2020.101171
M3 - Article
SN - 2212-9820
VL - 39
JO - Journal of CO2 Utilization
JF - Journal of CO2 Utilization
M1 - 101171
ER -
